<template>
    <el-menu default-active="1-4-1" 
        class="el-menu-vertical-demo" 
        @open="handleOpen" 
        @close="handleClose"
        :collapse="isCollapse"
        background-color="#545c64"
        text-color="#fff"
        active-text-color="#ffd04b"
        >

        <h3> {{isCollapse? '后台' : '通用后台管理'}} </h3>
        <el-menu-item 
            @click="clickMenu(item)"
            v-for="item in noChildren" 
            :key="item.name" 
            :index="item.name">
            <i :class="`el-icon-${item.icon}`"></i>
            <span slot="title">{{item.label}}</span>
        </el-menu-item>

        <el-submenu index="1" v-for="item in hasChildren" :key="item.label">
            <template slot="title">
                <i :class="`el-icon-${item.icon}`"></i>
                <span slot="title">{{item.label}}</span>
            </template>
            <el-menu-item-group v-for="subitem in item.children" :key="subitem.path">   
                <el-menu-item @click="clickMenu(subitem )" :index="subitem.path">{{subitem.name}}</el-menu-item>                
            </el-menu-item-group>
            
        </el-submenu>
        
    </el-menu>
</template>

<script>
export default {
    data() {
        return {
            menuData: [
                {
                    path: '/',
                    name: 'home',
                    label: '首页',
                    icon: 's-home',
                    url: 'Home/Home'
                },
                {
                    path: '/mall',
                    name: 'mall',
                    label: '商品管理',
                    icon: 'video-play',
                    url: 'MallManage/MallManage'
                },
                {
                    path: '/user',
                    name: 'user',
                    label: '用户管理',
                    icon: 'user',
                    url: 'UserManage/UserManage'
                },
                {
                    label: '其他',
                    icon: 'location',
                    children: [
                        {
                            path: '/page1',
                            name: 'page1',
                            label: '首页',
                            icon: 'setting',
                            url: 'Other/PageOne'
                        },
                        {
                            path: '/page2',
                            name: 'page2',
                            label: '首页',
                            icon: 'setting',
                            url: 'Other/PageTwo'
                        }
                    ]
                }
            ]
        };
    },
    computed: {
        //没有子菜单
        noChildren(){
            return   this.menuData.filter( item =>( !item.children))
        },
        //有子菜单
        hasChildren(){
            return  this.menuData.filter( item =>(item.children))
        },
        isCollapse(){
            return this.$store.state.tab.isCollapse
        }
        
    },
    methods: {
        handleOpen(key, keyPath) {
            console.log(key, keyPath);
        },
        handleClose(key, keyPath) {
            console.log(key, keyPath);
        },
        clickMenu(item){
            console.log(item);
            if(this.$route.path !== item.path && !(this.$route.path === '/home' && item.path === '/')){
                this.$router.push(item.path)
                // console.log(item)
            }
            //更新面包屑的数据
            this.$store.commit('selectMenu',item)
        }
    }
}
</script>

<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }

.el-menu{
    height: 100vh;
    border-right: none;
    h3{
        color:#fff;
        font-size: 16px;
        font-weight: 400;
        text-align: center;
        line-height: 48px;
    }
}
</style>